Subroutine in the programming
Describe the number of ways that an argument is passed to a subroutine in the programming?
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The argument can be passed in two ways in the programming language. They are Pass by Value and Passing by Reference.
Passing by value: This process copies the value of an argument to the formal parameter of the subroutine.
Passing by reference: In this process, a reference to an argument (not the value of argument) is passed to the parameter.
Passing by value: In this process separate memory builds for formal arguments and when any modifications done on formal variables, it will not influence the real variables. Therefore actual variables are preserved in this situation.
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